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http://nopr.niscpr.res.in/handle/123456789/46067| Title: | Studies on solute-solvent interactions in aqueous solution of isomeric mono-hydroxybenzoate salts |
| Authors: | Chatterjee, D K Seal, B K |
| Issue Date: | Apr-1992 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | Measurements of the relative viscosities of aqueous solutions of sodium salts of o-, m- and p-hydroxybenzoic acids in the temperature range 298-308 K have revealed that among the three salts, o- hydroxybenzoate has the smallest B-coefficient and it behaves as a structure breaker while the meta- and para-isomers act as water structure makers, the structure forming capacity of the latter two being almost the same. The energy of activation data support the above conclusions. The smaller B-coefficient of o- hydroxybenzoate ion may be due to involvement of the ortho-hydroxyl group in intra- and inter-molecular hydrogen bonding with the carboxylate group and the solvent water respectively. Since the probability of intra-molecular hydrogen bonding is absent in the case of meta- and para hydroxybenzoates, these have B-values higher than that of the o-isomer, A comparison of B-coefficients of the three isomeric mo no- hydroxybenzoate salts with that of sodium benzoate at 298 and 308 K shows that introduction of an hydroxyl group destroys partly the hydrophobic character of the benzene ring in the benzoic acid molecule. |
| Page(s): | 232-236 |
| ISSN: | 0975-0975(Online); 0376-4710(Print) |
| Appears in Collections: | IJC-A Vol.31A(04) [April 1992] |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| IJCA 31A(4) 232-236.pdf | 3.58 MB | Adobe PDF | View/Open |
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